Bryan J. Smith wrote:
First off, an .iso is an image of a filesystem, ISO9660 or UDF specifically.
Secondly, if you crypt/compress the .iso, you can't burn it with cdrecord AFAIK.
If I'm wrong, please correct me.
This would be an interesting test.
I don't only want the files to be crypted, but even the content shouldn't be guessed. A complete protection over which kind of data, files, filenames are in the DVD.
You'd be better off doing encryption on a per-file basis, then mastering the
image from that.
A 'per-file' encryption is not so difficult to realize just before the actual image creation and I know how to do it. However I would like to protect the 'whole' dvd globally, I don't know if I can correctly express my need.
I explain better the original idea:So you're not talking about burning it to media, but just leaving it as a "single file" on your hard drive? If so, then you _can_ do such using the loopback device.
1) I prepare my data
2) I generate an ISO image file with mkisofs
3) I encrypt it
4) I take the encrypted ISO image and I burn it to a dvd-r with dvdrecord or cdrecord-hack
5) I delete the data, the ISO, and the encrypted ISO from the hard disk
6) I put my dvd-r on the shelf for months
when I need the data...
7) I read the dvd with 'dd' on hard disk
8) I decrypt it
9) I mount the decrypted ISO image file as loopback OR I burn a DVD-R with it
I think the only problem would be in step 4), probably the ISO image is not valid anymore and can't be burned on DVD.
Stupid question: can I generate a local copy of a dvd (step 1) with dd? With data cd-roms I gave a: "dd if=/dev/hdc of=file.iso bs=2k" I don't know if this is ok with data DVD-roms, video DVD, whatever...
>I think I understand your point. I will try the 'iso into an iso' >system... .iso into .iso???
on another mail I was told to simply generate the ISO, encrypt it, and then generate another ISO containing the encrypted ISO. This will obviously work....
bye and thank you
as
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